🧬 ICD-10 CM R93.41 — Abnormal Radiologic Findings on Diagnostic Imaging of Renal Pelvis, Ureter, or Bladder
Billable Code Confirmed
ICD-10 CM R93.41 is a fully specified, billable 5-character code: the first three characters (R93) identify abnormal diagnostic imaging findings of other body structures, the fourth character (.4) narrows to urinary organs, and the fifth character (1) specifies the combined renal pelvis/ureter/bladder grouping. Unlike its sibling R93.42 (kidney), this code does not require a 6th laterality character since the renal pelvis/ureter/bladder grouping is not laterality-divided.
Non-Billable Parent Codes
R93 (abnormal findings on diagnostic imaging of other body structures) — a broad category header lacking any organ-system specificity and cannot be billed. R93.4 (abnormal findings on diagnostic imaging of urinary organs) — identifies the organ system but not which structure (renal pelvis/ureter/bladder vs. kidney vs. other urinary organ) showed the abnormality, and requires a fifth character. R93.42 (abnormal radiologic findings on diagnostic imaging of kidney) — a related but distinct sibling category that itself requires a sixth character for laterality before it is billable.
Clinical Context
Selection of R93.41 depends on the imaging report identifying an abnormality specifically within the renal pelvis, ureter, or bladder — as opposed to the renal parenchyma itself, which is captured under the separate kidney-specific R93.42x family — and on the absence of a more definitive diagnosis established at the time of the encounter.
Code Classification
ICD-10 CM R93.41 is a diagnosis code (ICD-10-CM) representing a symptom/finding rather than a confirmed disease process; it is intended as an interim code pending further diagnostic workup, not a terminal diagnosis.
🔍 Code Description
ICD-10 CM R93.41 captures an abnormal radiologic finding identified on diagnostic imaging — such as CT, MRI, ultrasound, or fluoroscopic urography — localized to the renal pelvis, ureter, or bladder, in a patient for whom the underlying cause of that finding has not yet been established. This code is most often used when a filling defect, wall irregularity, dilation, or other indeterminate radiographic abnormality is identified incidentally or during a symptom-driven workup, and the ordering or interpreting physician has not yet arrived at a definitive diagnosis such as N13.30 (hydronephrosis) or a urothelial neoplasm.
This code is distinct from its sibling R93.421 (abnormal radiologic finding, right kidney), which captures abnormalities of the renal parenchyma itself rather than the collecting system or bladder; correct code selection depends on precisely which anatomic structure the radiology report identifies as abnormal. Once follow-up workup — cystoscopy, biopsy, additional cross-sectional imaging — establishes a definitive etiology, ICD-10-CM Official Guidelines direct that the confirmed diagnosis be coded instead of, or in addition to, this abnormal-finding code, per the general guideline that signs/symptoms integral to an established diagnosis are not coded separately once that diagnosis is confirmed.
🌳 Code Tree / Hierarchy
R93 Abnormal findings on diagnostic imaging of other body structures ❌ Non-billable
│
├── R93.1 Abnormal findings on diagnostic imaging of heart and coronary circulation ✅ Billable
├── R93.2 Abnormal findings on diagnostic imaging of liver and biliary tract ✅ Billable
│
├── R93.4 Abnormal findings on diagnostic imaging of urinary organs ❌ Non-billable
│ │
│ ├── R93.41 Abnormal radiologic findings on diagnostic imaging of renal pelvis, ureter, or bladder ◀ THIS CODE ✅ Billable
│ │
│ ├── R93.42 Abnormal radiologic findings on diagnostic imaging of kidney ❌ Non-billable (category)
│ │ ├── R93.421 Abnormal radiologic findings on diagnostic imaging of right kidney ✅ Billable
│ │ ├── R93.422 Abnormal radiologic findings on diagnostic imaging of left kidney ✅ Billable
│ │ └── R93.429 Abnormal radiologic findings on diagnostic imaging of unspecified kidney ✅ Billable
│ │
│ └── R93.49 Abnormal radiologic findings on diagnostic imaging of other urinary organs ✅ Billable
│
└── R93.5 Abnormal findings on diagnostic imaging of other abdominal regions, including retroperitoneum ✅ BillableRenal Pelvis/Ureter/Bladder vs. Kidney Distinction Matters
Payers reviewing medical necessity for follow-up cystoscopy or ureteroscopy typically expect a collecting-system/bladder finding code (R93.41) rather than a parenchymal kidney finding code (R93.42x), so selecting the anatomically correct sibling directly supports the medical necessity of the specific follow-up procedure ordered.
Tip
Review the radiology report’s impression line carefully — “filling defect in the bladder” or “ureteral dilation” supports R93.41, while “renal mass” or “cortical lesion” supports the R93.42x kidney family instead.
✅ Includes
- An indeterminate filling defect identified within the renal pelvis on cross-sectional or fluoroscopic imaging, pending further characterization.
- An abnormal radiographic density or irregularity of the ureter without an established underlying diagnosis.
- An abnormal contour, wall thickening, or filling defect of the bladder identified on imaging, pending cystoscopic or pathologic confirmation.
❌ Excludes
Excludes 1
No Excludes1 relationship is identified at the R93.41 code level.
Danger
Because no Excludes1 note applies, coders sometimes mistakenly avoid using R93.41 alongside a related genitourinary symptom code (e.g., hematuria) out of caution — these may, in fact, be reported together when both the symptom and the separate imaging finding are independently documented and clinically relevant.
Excludes 2
N28.81 — Hypertrophy of kidney is excluded at the R93.4 category level; hypertrophy is a specific, established renal diagnosis rather than an indeterminate imaging finding, so it should be coded directly with N28.81 instead of, or in addition to, R93.41 when clinically appropriate and separately documented.
📋 Clinical Overview
Collecting System/Bladder Finding vs. Renal Parenchymal Finding
The key clinical distinction driving selection of R93.41 versus its kidney-specific sibling is precisely which anatomic structure the imaging abnormality involves.
| Feature | R93.41 | Related R93.421 | Related R93.49 |
|---|---|---|---|
| Anatomic structure | Renal pelvis, ureter, or bladder (collecting system/lower urinary tract). | Right kidney parenchyma specifically. | Other urinary organs not otherwise classified in this subcategory (e.g., urethra). |
| Laterality requirement | None — this grouping is not laterality-divided. | Requires laterality (right/left/unspecified) as the 6th character. | None — laterality is not applicable to this catch-all grouping. |
| Typical follow-up | Cystoscopy, ureteroscopy, retrograde pyelography, or repeat cross-sectional imaging targeting the collecting system. | Renal-protocol CT, MRI, or percutaneous/needle biopsy targeting the kidney itself. | Depends on the specific “other” urinary organ implicated; often urethroscopy or voiding cystourethrogram. |
Important
A CDI query is warranted when the radiology report is ambiguous about which structure — kidney parenchyma versus collecting system/bladder — demonstrates the abnormality, since this directly determines whether R93.41 or the R93.42x family applies.
Manifestations & Symptom Burden
- Often entirely asymptomatic; frequently an incidental finding on imaging obtained for an unrelated indication.
- May be identified during workup of hematuria, flank pain, or recurrent urinary tract infection.
- May represent an indeterminate filling defect later characterized as a stone, clot, polyp, or neoplasm.
Tip
Document the clinical context prompting the imaging study (e.g., hematuria workup, incidental finding on unrelated CT) since this supports medical necessity for the imaging itself and for any recommended follow-up procedure.
💰 HCC Risk Adjustment
| Model | HCC Category | RAF Weight | Notes |
|---|---|---|---|
| CMS-HCC V28 (PY2026) | N/A — not currently a payment HCC | N/A | Nonspecific symptom/abnormal-finding codes are not modeled as chronic risk-bearing conditions under V28 — flag to verify against current CMS-HCC V28 model software. |
ICD-10 CM R93.41 does not independently generate risk-adjustment value under CMS-HCC V28, since it represents an unresolved diagnostic finding rather than a confirmed chronic condition. If subsequent workup confirms an HCC-eligible condition (e.g., bladder cancer, chronic ureteral obstruction with renal impairment), that confirmed diagnosis should be captured with full MEAT documentation once established, as it — not R93.41 — carries RAF value.
🏥 MS-DRG Assignment
| DRG | Title | CC/MCC Tier |
|---|---|---|
| 695 | Kidney and Urinary Tract Signs and Symptoms | With MCC |
| 696 | Kidney and Urinary Tract Signs and Symptoms | Without MCC |
ICD-10 CM R93.41 groups to MDC 11 (DRG 695/696) only when it remains the most definitive diagnosis available at time of discharge for an admission built around genitourinary imaging workup; this DRG pair has only two tiers (with/without MCC), with no separate CC tier. Per ICD-10-CM Official Guidelines for symptom/finding codes, if the workup during the same encounter establishes a definitive underlying diagnosis, that diagnosis should be sequenced as principal instead, which will materially shift DRG assignment away from 695/696 — flag exact DRG relative weights for direct verification against the current IPPS Final Rule. NCD/LCD note: no dedicated National Coverage Determination or Local Coverage Determination specific to R93.41 itself was identified in the current Medicare Coverage Database search.¹ However, R93.41 commonly appears as a covered/supporting diagnosis on local MAC LCDs governing medical necessity for follow-up diagnostic studies such as CT urography, non-obstetric renal/bladder ultrasound, and diagnostic cystourethroscopy — verify the specific covered-diagnosis list on your MAC’s current LCD for the exact imaging or endoscopic CPT code being billed.²
🔗 Related ICD-10-CM Codes
Same Category — Sibling Urinary Imaging Findings
- R93.421 — Abnormal radiologic findings on diagnostic imaging of right kidney
- R93.422 — Abnormal radiologic findings on diagnostic imaging of left kidney
- R93.429 — Abnormal radiologic findings on diagnostic imaging of unspecified kidney
- R93.49 — Abnormal radiologic findings on diagnostic imaging of other urinary organs
Common Downstream/Confirmed Diagnoses
- N13.30 — Unspecified hydronephrosis
- N28.81 — Hypertrophy of kidney (Excludes2 — separately codeable, established diagnosis)
- R31.9 — Hematuria, unspecified, often the presenting symptom prompting the imaging that yields this finding
- N32.89 — Other specified disorders of bladder
🛠️ Commonly Associated CPT Codes
- 74176 — CT abdomen and pelvis without contrast material; a common imaging study yielding renal pelvis/ureter/bladder findings coded to R93.41.
- 74177 — CT abdomen and pelvis with contrast material; frequently used for urographic-phase imaging of the collecting system.
- 76775 — Ultrasound, retroperitoneal, limited; often used for a focused bladder or renal pelvis evaluation.
- 76770 — Ultrasound, retroperitoneal, complete; used for a comprehensive evaluation that may identify the abnormality.
- 52000 — Cystourethroscopy, diagnostic; a common follow-up procedure ordered to further characterize a bladder finding coded under R93.41.
- 74420 — Urography, retrograde, with or without KUB; used to further characterize a ureteral or renal pelvis abnormality identified on prior imaging.
🏷️ Modifier Reference
| Modifier | Name | When to Apply |
|---|---|---|
| -59 | Distinct Service | Apply to an associated imaging or endoscopic CPT code when a separately identifiable procedure is performed on the same date for an unrelated indication. |
| -76 | Repeat Procedure, Same Physician | Apply when a repeat imaging study is performed by the same physician to further characterize the previously identified abnormal finding. |
| -77 | Repeat Procedure, Different Physician | Apply when the repeat or follow-up imaging/endoscopic study is performed by a different physician than the one who obtained the original study. |
NCCI Bundling Considerations
Diagnostic imaging codes (e.g., 74176) are not typically bundled with subsequent, separately scheduled follow-up procedures such as 52000 cystoscopy when medical necessity for the follow-up procedure is clearly supported by the R93.41 finding documented on the prior imaging report.
🔬 ICD-10-PCS Crosswalk
ICD-10 CM R93.41 is a diagnosis code and does not itself convert to a procedure code; the following PCS codes represent common inpatient procedures performed to further characterize the finding it describes.
BT10ZZZ— Plain radiography of bladder using low osmolar contrast, if a retrograde cystogram is performed inpatient to characterize the finding.0T7B8ZZ— Dilation of bladder neck, via natural or artificial opening endoscopic, if a cystoscopic intervention is performed based on the imaging finding — flag to verify exact body-part character against the specific structure involved.0T908ZX— Drainage of bladder, via natural or artificial opening endoscopic, diagnostic, applicable if diagnostic cystoscopy with biopsy is performed to further evaluate the finding. Confirm exact body-part, approach, and qualifier characters against your facility’s encoder based on the specific procedure documented, since the correct PCS code depends entirely on which follow-up intervention (imaging vs. endoscopic vs. biopsy) is actually performed.
💊 Coding Scenarios and Examples
Example 1
Clinical Scenario:
A 62-year-old male undergoes a CT abdomen/pelvis with contrast for evaluation of nonspecific abdominal pain. The radiologist identifies an indeterminate filling defect in the bladder wall with no prior imaging for comparison. No definitive diagnosis is established at the time of the report, and the patient is referred for outpatient cystoscopy.
| Field | Code | Rationale |
|---|---|---|
| CPT | 74177 | CT abdomen and pelvis with contrast, the study on which the abnormal bladder finding was identified. |
| PDx | R93.41 | The bladder filling defect is an indeterminate imaging finding without an established diagnosis at this encounter. |
Tip
Do not assign a more specific bladder diagnosis (e.g., a neoplasm code) until pathology or cystoscopic findings confirm one; R93.41 is the appropriate interim code.
Document clearly that outpatient cystoscopy was recommended, since this supports the medical necessity for the subsequent procedure.
Example 2
Clinical Scenario:
A 45-year-old female inpatient undergoes renal ultrasound during workup for unexplained flank pain. The study identifies an indeterminate dilation of the proximal right ureter without a clearly identifiable obstructing lesion. Urology performs diagnostic cystoscopy with attempted retrograde pyelography the same admission, which remains inconclusive.
| Field | Code | Rationale |
|---|---|---|
| CPT | 76770 | Complete retroperitoneal ultrasound identifying the ureteral abnormality. |
| CPT 2 | 52000 | Diagnostic cystourethroscopy performed to further characterize the finding. |
| PDx | R93.41 | The ureteral finding remains indeterminate even after cystoscopic evaluation, so the abnormal-finding code remains appropriate as principal diagnosis. |
Tip
Because the workup did not yield a definitive diagnosis (e.g., confirmed stricture or stone) by the time of this documentation, R93.41 remains correctly sequenced as principal diagnosis rather than defaulting to a more specific but unconfirmed code.
Example 3
Clinical Scenario:
A patient’s outpatient CT urogram identifies an abnormal filling defect in the renal pelvis. One week later, follow-up ureteroscopy with biopsy confirms a low-grade urothelial neoplasm of the renal pelvis, and the patient is scheduled for definitive treatment.
| Field | Code | Rationale |
|---|---|---|
| CPT | 74420 | Retrograde urography performed as part of the follow-up characterization of the initial finding. |
| PDx | R93.41 | Appropriate for the initial CT urogram encounter, before the neoplasm was pathologically confirmed. |
Tip
Once the biopsy confirms the urothelial neoplasm, subsequent encounters should code the confirmed neoplasm diagnosis rather than continuing to report R93.41, per ICD-10-CM guidance that abnormal-finding codes are superseded once a definitive diagnosis is established.
⚠️ Coding Pitfalls and Tips
- Pitfall 1: Continuing to report R93.41 at follow-up encounters after a definitive diagnosis (e.g., urothelial neoplasm, ureteral stricture) has already been established; Tips: Always check whether a prior encounter’s workup reached a conclusion before defaulting to the abnormal-finding code again.
- Pitfall 2: Confusing R93.41 (collecting system/bladder) with R93.421/R93.422/R93.429 (kidney parenchyma) when the radiology report’s anatomic terminology is ambiguous; Tips: Query the interpreting radiologist if the report does not clearly distinguish parenchymal versus collecting-system/bladder involvement.
- Pitfall 3: Reporting R93.41 in addition to a symptom code (e.g., hematuria) when the symptom is fully explained by the confirmed underlying diagnosis rather than the imaging finding itself; Tips: Apply ICD-10-CM Official Guidelines on integral signs/symptoms — code the definitive diagnosis alone once established, unless the symptom and imaging finding are independently significant.
- Pitfall 4: Assigning R93.41 any CMS-HCC V28 risk-adjustment value; Tips: Recognize that nonspecific finding codes are not payment HCCs, and instead track the chart for a confirmed downstream diagnosis to capture for risk adjustment.
- Pitfall 5: Failing to verify local MAC LCD covered-diagnosis lists before billing a follow-up imaging or endoscopic CPT code with R93.41 as the supporting diagnosis; Tips: Check the specific LCD for the CPT code being billed (e.g., CT urography, cystoscopy) to confirm R93.41 is listed as a covered indication.
- Pitfall 6: Omitting documentation of the clinical context that prompted the original imaging study; Tips: Ensure the physician’s note references the indication for imaging (e.g., hematuria, flank pain, incidental finding) to support medical necessity for both the initial study and any recommended follow-up.
📚 Sources
1. Centers for Medicare & Medicaid Services. *Medicare Coverage Database (MCD) — NCD/LCD Search.* CMS.gov; 2026. https://www.cms.gov/medicare-coverage-database 2. Centers for Medicare & Medicaid Services. *Local Coverage Determinations for Diagnostic Imaging (CT Abdomen/Pelvis, Non-Obstetric Ultrasound, Cystourethroscopy).* CMS.gov; 2026. 3. Centers for Medicare and Medicaid Services and the National Center for Health Statistics. *ICD-10-CM 2026, Code R93.41.* NCHS; 2026. https://www.icd10data.com/ICD10CM/Codes/R00-R99/R90-R94/R93-/R93.41 4. AAPC. *ICD-10-CM R93.41 — Excludes1/Excludes2 Notes.* Codify by AAPC; 2026. https://www.aapc.com/codes/icd-10-codes/R93.41 5. Centers for Medicare & Medicaid Services and Centers for Disease Control and Prevention. *ICD-10-CM Official Guidelines for Coding and Reporting, FY2026.* CMS/NCHS; 2026.Sources listed above correspond to superscript citations throughout this note. Verify all Medicare payment figures against your current CMS PFS Lookup tool and applicable MAC LCD prior to claim submission. Please use the latest AAPC/AHIMA Coding Books to verify each code within this note.